[Ips-dsgr] ASWFC Daily Report - 13 August 26 issued 2330 UT on 13 Aug 2026 [SEC=OFFICIAL]
Australian Space Weather Forecasting Centre
aswfc at bom.gov.au
Fri Aug 14 09:30:54 AEST 2026
SUBJ: ASWFC DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/13 AUGUST 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
SUMMARY FOR 13 AUGUST AND FORECAST FOR 14 AUGUST - 16 AUGUST
STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx
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1A. SOLAR SUMMARY
Activity 13 Aug: R0
Flares: none.
Observed 10.7 cm flux/Equivalent Sunspot Number for 13 Aug: 108/58
1B. SOLAR FORECAST
14 Aug 15 Aug 16 Aug
Activity R0 R0 R0
Fadeouts None expected None expected None expected
10.7cm/SSN 110/60 105/54 100/48
COMMENT: Solar activity on UT day 13-Aug was at the R0 level,
with no solar flares above the C-class threshold. There are currently
seven numbered active regions (ARs) visible on the solar disk.
ARs 4507 (N04E19, beta) and 4510 (N13W08, beta) showed some spot
development over the UT day. There are no large and magnetically
complex regions present on the solar disk. Solar activity over
14-16 Aug is expected to be at the R0 level. No Earth directed
CMEs were observed on UT day 13-Aug. S0 solar radiation storm
conditions were observed on UT day 13-Aug and are expected over
14-16 Aug. The solar wind speed was steady and near background
levels on UT day 13-Aug, mostly ranging between 365 and 410 km/s.
The solar wind speed is currently at around 400 km/s. The interplanetary
magnetic field (IMF) strengthened slightly over the UT day, with
the peak total field strength (Bt) at 8 nT and the north-south
IMF component ranging between 6 and -5 nT. There is a chance
of a mild increase in solar wind speed over 14-15 Aug due to
high speed wind stream effects from a small coronal hole in a
geoeffective position. Background solar wind conditions are expected
on 16-Aug.
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2A. MAGNETIC SUMMARY
Geomagnetic field for Australian Region 13 Aug: G0
Estimated Indices 13 Aug : A K
Australian Region 1 11100011
Cocos Island 1 11110010
Darwin 1 11100011
Townsville 3 12111012
Learmonth 2 11110011
Alice Springs 2 11100012
Gingin 1 11100011
Canberra 1 01001002
Kennaook Cape Grim 2 11001012
Hobart 1 01001010
Estimated Antarctic Regional K Indices 13 Aug :
Macquarie Island 1 00001011
Casey 5 23220011
Mawson 29 44321137
Observed Regional daily pc3 Indices 13 Aug :
Darwin 0 (Quiet)
Townsville 0 (Quiet)
Learmonth 0 (Quiet)
Alice Springs 0 (Quiet)
Gingin 0 (Quiet)
Canberra 2 (Quiet)
Hobart 5 (Quiet)
Pc3 pulsations are high frequency (10-45 second period) variations
of the Earths magnetic field. Daily pc3-indices are the daily sum
of 20 minute pc3-indices for that station and have been shown to be
well correlated with rejection of high resolution aeromagnetic
survey flight-line data.
NOTE: Indices may have been generated from data obtained in
cooperation with the following organisations: Geoscience Australia,
University of Newcastle Space Physics Group, Australian Government
Antarctic Division and International Center for Space Weather
Science and Education, Japan.
Estimated AFr/Ap Indices 13 Aug : A
Fredericksburg 7
Planetary 8
Observed AFr/Ap Indices 12 Aug : A K
Fredericksburg 8
Planetary 8 2322 2131
2B. MAGNETIC FORECAST
Date Ap Conditions
14 Aug 12 G0
15 Aug 14 G0
16 Aug 8 G0
COMMENT: G0 geomagnetic conditions were observed at the planetary
level and in the Australian region on UT day 13-Aug. Mostly G0
conditions were observed in the Antarctic conditions, with a
single period of G3 observed at Mawson. G0 geomagnetic conditions
are expected over 14-16 Aug. A small coronal hole may enhance
the solar wind conditions at Earth over 14-15 Aug, but is not
expected to significantly impact geomagnetic conditions.
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3A. GLOBAL HF PROPAGATION SUMMARY
Latitude Band
Date Low Middle High
13 Aug Normal-fair Normal-fair Normal-fair
PCA Event : No event.
3B. GLOBAL HF PROPAGATION FORECAST
Latitude Band
Date Low Middle High
14 Aug Normal Normal Normal-fair
15 Aug Normal Normal Normal-fair
16 Aug Normal Normal Normal-fair
COMMENT: HF radio propagation conditions on UT day 13-Aug were
mostly normal to fair. HF radio propagation conditions are expected
to be mostly normal over 14-16 Aug, with some mild degradations
possible at high latitudes over 14-15 Aug due to enhanced solar
wind speeds.
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4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY
Date T index
13 Aug 53
Observed Australian Regional MUFs
Cocos Island Region:
No data available during local day.
No data available during local night.
Niue Island Region:
Near predicted monthly values during local day.
Depressed by 30% during local night.
Northern Australian Region:
Near predicted monthly values.
Southern Australian Region:
Near predicted monthly values.
Antarctic Region (Casey/Davis/Mawson):
Near predicted monthly values over the UT day.
Monthly T index:
Month T index
Jul 75
Aug 64
Sep 61
4B. AUSTRALIAN REGION IONOSPHERIC FORECAST
Date T index MUFs
14 Aug 55 Near predicted monthly values
15 Aug 55 Near predicted monthly values
16 Aug 55 Near predicted monthly values
COMMENT: Maximum usable frequencies (MUFs) in the Australian
region on UT day 13-Aug were mostly near predicted values. MUFs
are expected to be mostly near predicted values over 14-16 Aug,
with mild depressions possible during local night hours on 14-15
Aug.
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5. SPACE ENVIRONMENT SUMMARY
GOES satellite data for 12 Aug
Daily Proton Fluence >1 MeV: 1.8E+05
Daily Proton Fluence >10 MeV: 2.0E+04
Daily Electron Fluence >2 MeV: 1.50E+07 (normal fluence)
Electron Fluence Daily Deep Dielectric Discharge Probability: 3%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
X-ray background: B2.8
DSCOVR Satellite Solar Wind Day Averaged Data for 12 Aug
Speed: 442 km/sec Density: 3.4 p/cc Temp: 107000 K Bz: -1 nT
(Courtesy Space Weather Prediction Center, Boulder USA)
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Australian Space Weather Forecasting Centre
Bureau of Meteorology
ASWFC at bom.gov.au
www.bom.gov.au | www.sws.bom.gov.au
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